Calculators
Cuboid Calculator
Calculate cuboid volume, surface area, and space diagonal from length, width, and height locally in your browser.
Enter a length, a width, and a height from 0 (exclusive) to 1000000000 to see the volume (length x width x height), surface area (2 x (lw + lh + wh)), space diagonal, and shape. The calculation runs locally in your browser; your values are not uploaded or stored.
Find cuboid measurements without uploading anything.
Enter a length, a width, and a height from 0 (exclusive) to 1000000000 to see the volume, surface area, space diagonal, and shape. Everything runs locally in your browser, so your values are not uploaded or stored.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
What does the cuboid calculator show?
Enter a length, a width, and a height from 0 (exclusive) to 1000000000. The calculator returns the volume (length times width times height), the surface area (2 times length-width plus length-height plus width-height), the space diagonal (square root of length squared plus width squared plus height squared), and the shape (cube when all three sides are equal, otherwise cuboid). For example, length 5, width 3, and height 4 give volume 60, surface area 94, space diagonal about 7.07106781187, and cuboid shape.
Which formulas does the cuboid calculator use?
It uses volume = length x width x height, surface area = 2 x (lw + lh + wh), and space diagonal = square root of (length squared + width squared + height squared) from the Pythagorean theorem extended to three dimensions. The shape is cube when length, width, and height are equal and cuboid otherwise.
Which inputs are accepted?
Enter a length, a width, and a height greater than zero through 1000000000. Decimal values are accepted. Zero, negative numbers, non-numeric text, and values above the limit show a clear error instead of a result.
Do my numbers stay private?
Yes. The calculation and copy action run locally in your browser. CodeASystem does not upload or store the values you enter.